JP6988730B2 - Stitch decorative parts and their manufacturing methods - Google Patents

Description

The present invention relates to a stitch decorative part in which a stitch pattern is sewn only by a thread inserted from the surface side of the skin material adhered to the surface of the base material, and a method for manufacturing the same.

For example, in the interior parts of automobiles, the surface of the base material made of hard synthetic resin is covered with a soft skin material, and the surface of the skin material is textured and stitched to improve the design appearance. , It has been devised to create a sense of luxury and softness. As a method of forming this stitch pattern by sewing a thread, for example, a method of manufacturing a stitched part in which a stitch pattern is formed only by a needle thread without using a bobbin thread is disclosed in Patent Document 1.

That is, in Patent Document 1, as shown in FIG. 15, the sewing needle 101 arranged above the skin material 102 and having the thread hole 101a at the needle tip is operated in the vertical direction to move the thread 103 to the back surface side of the base material 104. A receiver having a thread supply device 105 to be supplied to the thread 103 and a thread relief portion 106a in which the loop portion 103a of the thread 103 is accommodated while being in contact with the back surface of the base material 104 and holding the base material 104 in a predetermined posture. A rubber-based member is provided with a jig 106, and when the sewing needle 101 is pulled back from a predetermined position inserted into the base material 104 and the rubber-based member 107 superposed on the back surface thereof to the front surface side (direction of arrow H) of the skin material 102. Described is a method for manufacturing a stitched part, characterized in that the thread insertion hole 107a formed in 107 is reduced in diameter to restrain the root portion of the loop portion 103a of the thread.

JP-A-2017-71382

However, the method for manufacturing stitched parts described in Patent Document 1 has the following problems.
That is, at the place where the reinforcing rib is arranged on the back surface side of the base material 104, the sewing needle 101 and the thread 103 interfere with the reinforcing rib, and a stable thread loop portion 103a cannot be formed on the back surface side of the base material 104. Therefore, there is a problem that it becomes difficult to form a good-looking stitch pattern in such a place. Further, in the corner portion where the base material 104 is bent at a right angle or an acute angle, there is little space on the back surface side of the base material 104, and the sewing needle 101 to be inserted later into the loop portion 103a of the thread formed earlier between the adjacent stitches. There has been a problem that it is difficult to form a good-looking stitch pattern in such a place because of interference. In either case, there is a problem that the formation of the stitch pattern is limited by the structural factor on the back surface side of the base material 104.

The present invention has been made to solve the above problems, and is a stitch decorative part which is not affected by structural factors on the back surface side of the base material and can easily form a good-looking stitch pattern, and a stitch decorative part thereof. The purpose is to provide a manufacturing method.

In order to solve the above problems, the stitch decorative parts and the manufacturing method thereof according to the present invention have the following configurations.
(1) A stitch decorative component having a base material and a skin material adhered to the surface of the base material, and having a stitch pattern formed on the surface side of the skin material by a thread inserted from the surface side of the skin material. And
The thread is characterized in that it is locked by a thread locking member inserted between the base material and the skin material at the position of the seam of the stitch pattern.

In the present invention, the thread is locked by the thread locking member inserted between the base material and the skin material at the position of the stitch pattern seam, and thus affects the structural factors on the back surface side of the base material. A stitch pattern can be formed on the surface side of the skin material without the problem. That is, since the thread locking member that locks the thread at the position of the stitch of the stitch pattern is inserted between the base material and the skin material, it is not necessary to insert the thread to the back surface side of the base material, and the base is It is not affected by structural factors on the back side of the material. For example, when the reinforcing ribs are formed on the back surface side of the base material, the stitch pattern can be easily formed above the reinforcing ribs or at a position adjacent to the reinforcing ribs. Further, when the base material is formed by bending at a right angle or an acute angle, a stitch pattern can be easily formed on the corner portion where the base material is bent.

Therefore, according to the present invention, it is possible to provide a stitch decorative part that is not affected by structural factors on the back surface side of the base material and that can easily form a good-looking stitch pattern.

(2) In the stitch decorative parts described in (1),
A groove-shaped gap is formed on the surface of the base material along the stitch pattern, and the thread locking member is inserted into the groove-shaped gap.

In the present invention, a groove-shaped gap is formed on the surface of the base material along the stitch pattern, and the thread locking member is inserted in the groove-shaped gap, so that the foam layer of the skin material is thin. Alternatively, even when the foam layer has high rigidity, the thread locking member can be reasonably inserted between the base material and the skin material. Therefore, even when the foam layer of the skin material is compressed in a flat shape, the thread locking member is embedded in the groove-shaped gap portion of the base material without being deformed, and the amount of protrusion of the thread locking member toward the skin material side. Can be reduced. As a result, the thread locking member inserted between the base material and the skin material suppresses the deformation (unevenness) of the skin of the skin material, and a good-looking stitch pattern can be easily formed on the surface side of the skin material. .. The groove-shaped voids may be formed continuously along the stitch pattern, or may be formed intermittently at each stitch position of the stitch pattern.

(3) In the stitch decorative parts described in (2),
A rubber-based member is fitted in the groove-shaped gap portion, and the thread locking member is inserted into the rubber-based member.

In the present invention, since the rubber-based member is fitted in the groove-shaped gap and the thread locking member is inserted in the rubber-based member, the foam layer of the skin material is soft and the thread locking member is formed. Even when the holding force is small, the holding force of the thread locking member can be increased by the elastic binding force of the rubber-based member. Therefore, it is possible to suppress the thread locking member inserted between the base material and the skin material from coming off, and to easily form a good-looking stitch pattern on the surface side of the skin material.

(4) In the stitch decorative part according to any one of (1) to (3).
The thread locking member is characterized by having a retaining portion extending along the base material and a thread engaging portion formed on the anti-base material side of the retaining portion to lock the yarn.

In the present invention, the thread locking member has a retaining portion extending along the base material and a thread engaging portion formed on the anti-base material side of the retaining portion to lock the yarn. Even if a tensile force acts on the surface side of the skin material on the locked thread, the skin material covering the retaining portion resists and prevents the retaining portion extending along the base material from coming out of the skin material. be able to. Therefore, the thread locking member that locks the thread does not come out from the skin material, and the thread that forms the stitch pattern can be prevented from coming off or fraying, and a good-looking stitch pattern can be formed.

(5) In the stitch decorative parts described in (4),
The retaining portion is made of a cylinder having a predetermined length, and the thread engagement portion is made of a torus or C-shaped body through which the thread is passed, and the axis of the cylinder and the axis of the torus or C-shaped body. It is characterized in that the center is orthogonal to the center and the axial thickness of the torus or C-shape is smaller than the outer diameter of the cylinder.

In the present invention, the retaining portion is made of a cylinder having a predetermined length, and the thread engagement portion is made of a torus or C-shaped body through which the thread is passed, and the axis of the cylinder and the axis of the torus or C-shaped body. Since the center is orthogonal and the axial thickness of the torus or C-shape is smaller than the outer diameter of the cylinder, the volume of the thread locking member is reduced and easily inserted between the base material and the skin material. can. Therefore, it is possible to minimize the amount of compression of the skin material by the thread locking member inserted between the base material and the skin material, and to form a good-looking stitch pattern.

(6) In the method for manufacturing a stitch decorative part according to any one of (1) to (5).
An insertion needle that holds the thread locking member and inserts it between the base material and the skin material, an extrusion pin that pushes out the thread locking member from the insertion needle, and advances and retreats of the insertion needle and the extrusion pin. Equipped with a needle drive device with a drive mechanism,
In the needle driving device, the tip of the insertion needle in a state of holding the thread locking member in which the thread is locked is placed on the base material and the base material from the surface side of the skin material at the position of the stitch of the stitch pattern. After or at the same time as inserting the thread between the skin material and the skin material, the extrusion pin is advanced to push the thread locking member into the skin material from the tip of the insertion needle to lock the thread. The thread locking member is inserted between the base material and the skin material.

In the present invention, an insertion needle that holds the thread locking member and inserts it between the base material and the skin material, an extrusion pin that pushes out the thread locking member from the insertion needle, and a drive mechanism that advances and retreats the insertion needle and the extrusion pin. The needle drive device is provided with a needle drive device having a thread, and the needle drive device is a base material from the surface side of the skin material at the position of the stitch pattern seam at the tip of the insertion needle in a state where the thread locking member holding the thread locking member is held. After or at the same time as inserting the thread between the thread and the skin material, the extrusion pin is advanced to push the thread locking member into the skin material from the tip of the insertion needle, and the thread locking member in a state where the thread is locked. Is inserted between the base material and the skin material, so simply insert the insertion needle at the position of the seam of the stitch pattern and advance the extrusion pin, and the thread locking member in the state where the thread is locked is the skin material. It can be easily inserted and fixed between the base material and the base material, and a stitch pattern can be easily formed on the surface side of the skin material.

Therefore, according to the present invention, it is possible to provide a method for manufacturing a stitch decorative part which is not affected by structural factors on the back surface side of the base material and can easily form a good-looking stitch pattern.

(7) In the method for manufacturing stitch decorative parts according to (6),
A locking member unit in which a plurality of the thread locking members are connected to a guide rod formed in a straight line at a predetermined pitch is manufactured in advance, and the locking member unit is mounted on the needle driving device.
The needle drive device disconnects the thread locking member connected to the guide rod while moving the guide rod in the axial direction by a predetermined pitch, and holds the separated thread locking member in the insertion needle. It is characterized in that it is extruded into the skin material and inserted between the skin material and the base material.

In the present invention, a locking member unit in which a plurality of thread locking members are connected to a guide rod formed in a straight line at a predetermined pitch is manufactured in advance, and the locking member unit is mounted on the needle drive device. Therefore, it is possible to save the trouble of attaching a plurality of thread locking members to the needle drive device one by one. Further, the needle drive device separates the thread locking member connected to the guide rod while moving the guide rod in the axial direction by a predetermined pitch, and holds the separated thread locking member on the insertion needle to hold the skin material. Since it is extruded inward and inserted between the skin material and the base material, the thread locking member separated from the guide rod can be separated from the guide rod by simply moving the needle drive device along the seam of the stitch pattern. It can be inserted continuously between them. Therefore, it is possible to form a good-looking stitch pattern more quickly.

(8) In the method for manufacturing a stitch decorative part according to (6) or (7).
The inclination angle of the insertion needle with respect to the skin material is in the range of 30 degrees to 70 degrees.

In the present invention, the inclination angle of the insertion needle with respect to the skin material is in the range of 30 degrees to 70 degrees, so that the thread locking member held by the insertion needle is inserted into the skin material and the extrusion pin is inserted. Can move the thread locking member smoothly along the base material or the like when the thread locking member is pushed forward and pushed out from the insertion needle. Therefore, the resistance force that the thread locking member receives from the base material or the like can be relaxed, and the thread locking member can be stably inserted between the base material and the skin material. As a result, a good-looking stitch pattern can be stably formed.

According to the present invention, it is possible to provide a stitch decorative part and a method for manufacturing the same, which is not affected by structural factors on the back surface side of the base material and can easily form a good-looking stitch pattern.

It is a perspective view which shows the stitch decorative part which concerns on this embodiment. It is sectional drawing (A) sectional drawing of the stitch decorative part of 1st Embodiment among the stitch decorative parts shown in FIG. It is sectional drawing (A) sectional drawing of the stitch decorative part of 2nd Embodiment among the stitch decorative parts shown in FIG. It is sectional drawing (A) sectional drawing of the stitch decorative part of 3rd Embodiment among the stitch decorative parts shown in FIG. It is sectional drawing (A) sectional drawing of the stitch decorative part of 4th Embodiment among the stitch decorative parts shown in FIG. It is sectional drawing (A) sectional drawing of the stitch decorative part of 5th Embodiment among the stitch decorative parts shown in FIG. It is sectional drawing (A) sectional drawing of the stitch decorative part of 6th Embodiment among the stitch decorative parts shown in FIG. 2 is a detailed view of the thread locking member shown in FIGS. 2 to 7, in which FIG. 2A is a front view thereof and FIG. 7B is a plan view thereof. 2 is a detailed view of the modified example of the thread locking member shown in FIGS. 2 to 7, in which FIG. 2A is a front view thereof and FIG. 7B is a plan view thereof. 2 is a perspective view of a locking member unit and an insertion needle in which the thread locking members shown in FIGS. 2 to 7 are connected to a connecting rod at a predetermined pitch. FIG. 10 is a view taken along the arrow B shown in FIG. 10, showing a state in which the thread locking member at the head of the thread locking member unit is separated and held by the insertion needle. It is a C arrow view shown in FIG. It is a processing cross-sectional view which shows the processing procedure which forms the stitch pattern shown in FIG. (A) shows the state before inserting the insertion needle into the seam position, and (b) shows the state where the extrusion pin is advanced to push the thread locking member into the skin material from the tip of the insertion needle. c) indicates a state in which the thread locking member for locking the thread is inserted between the base material and the skin material at the position of the seam. It is a processing sectional view which shows the processing procedure which forms the stitch pattern shown in FIG. (A) shows the state before inserting the insertion needle into the seam position, and (b) shows the state where the extrusion pin is advanced to push the thread locking member into the skin material from the tip of the insertion needle. c) indicates a state in which the thread locking member for locking the thread is inserted between the base material and the skin material at the position of the seam. It is sectional drawing of the stitch processing apparatus described in Patent Document 1.

Next, the stitch decorative parts and the method for manufacturing the stitch decorative parts according to the embodiment of the present invention will be described in detail with reference to the drawings. First, the structure of the present stitch decorative part in the first to sixth embodiments will be described in detail, and then the manufacturing method thereof will be described in detail.

<Structure of the present stitch decorative parts in the first to sixth embodiments>
First, the structures of the stitch decorative parts according to the present embodiment in the first to sixth embodiments will be described with reference to FIGS. 1 to 9. FIG. 1 shows a perspective view showing a stitch decorative part according to the present embodiment. FIG. 2 shows a cross-sectional view taken along the line AA of the stitch decoration parts of the first embodiment among the stitch decoration parts shown in FIG. FIG. 3 shows a cross-sectional view taken along the line AA of the stitch decoration parts of the second embodiment among the stitch decoration parts shown in FIG. FIG. 4 shows a cross-sectional view taken along the line AA of the stitch decorative parts of the third embodiment among the stitch decorative parts shown in FIG. FIG. 5 shows a cross-sectional view taken along the line AA of the stitch decoration parts of the fourth embodiment among the stitch decoration parts shown in FIG. FIG. 6 shows a cross-sectional view taken along the line AA of the stitch decorative parts of the fifth embodiment among the stitch decorative parts shown in FIG. FIG. 7 shows a cross-sectional view taken along the line AA of the stitch decorative parts of the sixth embodiment among the stitch decorative parts shown in FIG. 8A and 8B are detailed views of the thread locking member shown in FIGS. 2 to 7, where FIG. 8A shows a front view thereof and FIG. 8B shows a plan view thereof. 9A and 9B are detailed views of a modified example of the thread locking member shown in FIGS. 2 to 7, where FIG. 9A shows a front view thereof and FIG. 9B shows a plan view thereof.

(First Example)
As shown in FIGS. 1 and 2, the stitch decorative component 10 includes a base material 1 and a skin material 2 adhered to the surface 12 of the base material 1, and a thread inserted from the surface side of the skin material 2. It is a stitch decorative part 10 having a stitch pattern 3 formed on the surface side of the skin material 2 by 31. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1 and the skin material 2 at the position of the seam 32 of the stitch pattern 3.

With the above configuration, the stitch pattern 3 can be formed on the front surface side of the skin material 2 without being affected by the structural factors on the back surface side of the base material 1. That is, since the thread locking member 4 that locks the thread 31 at the position of the seam 32 of the stitch pattern 3 is inserted between the base material 1 and the skin material 2, the thread 31 reaches the back surface side of the base material 1. Is not required to be inserted, and is not affected by structural factors on the back surface side of the base material 1. For example, when the reinforcing rib 11 is formed on the back surface side of the base material 1, the stitch pattern 3 can be easily formed at a position above the reinforcing rib 11 or adjacent to the reinforcing rib 11.

Here, the stitch decorative component 10 is applied to, for example, an instrument panel arranged in front of a driver's seat and a passenger's seat of a vehicle, and has a base material 1 made of a hard synthetic resin formed into a required shape and a base material 1. It is composed of a soft skin material 2 adhered to the surface 12 of the base material 1. The base material 1 is made of, for example, injection-molded polypropylene (PP) resin.

Further, the skin material 2 is composed of a skin 21 having excellent ductility on the surface side and a foam layer 22 on the base material side. A leather-like grain pattern is formed on the skin 21 in order to give a feeling of luxury and softness. The skin 21 is made of an olefin-based elastomer (TPO) resin having a thickness of, for example, about 0.5 to 0.8 mm. The foam layer 22 is made of polypropylene foam (PPF) resin having a thickness of, for example, about 3 to 4 mm.

Further, for example, a stitch pattern 3 extending in the left-right direction of the vehicle is formed on the surface of the skin material 2. The thread 31 of the stitch pattern 3 is made of, for example, a synthetic fiber having an outer diameter of about 0.5 to 0.8 mm. Further, the thread locking member 4 is a member that locks the thread 31 at the position of the seam 32 of the stitch pattern 3, and is made of, for example, a polyamide-based synthetic resin having excellent strength (for example, nylon (registered trademark)). Or, it is made of polypropylene (PP) resin, which is excellent in terms of cost. The thread locking member 4 is in contact with the surface 12 of the base material 1 and is covered with the foam layer 22 of the skin material 2.

Further, as shown in FIGS. 2 and 8, the thread locking member 4 has a retaining portion 41 extending along the base material 1 and a surface extending along the anti-base material side of the retaining portion 41 (a surface extending along the base material 1). It has a thread engaging portion 42 formed on the opposite side to the thread 31 and engaging the thread 31. The retaining portion 41 is a rod-shaped body, and the size in the longitudinal direction thereof is formed to be larger than the external dimension of the thread engaging portion 42 in the same direction. Further, the thread engaging portion 42 is formed in the intermediate portion in the longitudinal direction of the retaining portion 41 so that the load applied from the locked thread 31 acts substantially evenly on both ends of the retaining portion 41 in the longitudinal direction. .. As shown in FIG. 2, the longitudinal direction of the retaining portion 41 is arranged in substantially the same direction as the sewing direction F of the stitch pattern 3.

As shown in FIGS. 8 and 9, the thread locking members 4 and 4B can be formed into various shapes. For example, the retaining portion 41 is made of a cylindrical body having a predetermined length l, and the thread engaging portion 42 is made of a torus 42a or a C-shaped body 42b through which the thread 31 is passed, and the axial center CL1 and the torus 42a of the cylindrical body are formed. Alternatively, it is formed so that the axial center CL2 of the C-shaped body 42b is orthogonal to the axial thickness t1 of the torus 42a or the axial thickness t2 of the C-shaped body 42b is smaller than the outer diameter t3 of the cylindrical body. ..

Further, the annular body 42a is formed with a through hole 421a through which the thread 31 is inserted. Further, the C-shaped body 42b is formed with claws 421b for locking the thread 31. The torus 42a or the C-shaped 42b is connected to the retaining portion 41 via the neck portion 43. The neck portion 43 is formed in an intermediate portion 411 in the longitudinal direction of the retaining portion 41. In the C-shaped body 42b, it is preferable to form the open portion 422b of the claw 421b at a position adjacent to the neck portion 43 so that the locking thread 31 does not come off. Further, it is preferable that the gap of the open portion 422b of the claw 421b is equal to or slightly smaller than the outer diameter of the thread 31.

(Second Example)
As shown in FIGS. 1 and 3, the stitch decorative component 10B of the second embodiment includes a base material 1B and a skin material 2B bonded to the surface 12B of the base material 1B, and is provided with a skin material 2B on the surface side of the skin material 2B. It is a stitch decorative part 10B having a stitch pattern 3 formed on the surface side of the skin material 2B by the thread 31 inserted from the above. The skin material 2B is composed of a skin 21B having excellent ductility on the surface side and a foam layer 22B on the base material side. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1B and the skin material 2B at the position of the seam 32 of the stitch pattern 3. Here, since the configurations of the stitch pattern 3 and the thread locking member 4 are the same as those in the first embodiment, the same reference numerals are given and detailed description thereof will be omitted.

The stitch decorative part 10B of the second embodiment has the following configuration different from that of the first embodiment. That is, in the stitch decorative part 10B of the second embodiment, the groove-shaped gap portion 121B is formed on the surface 12B of the base material 1B along the stitch pattern 3, and the thread locking member 4 has the groove-shaped gap portion. It is inserted in 121B. Further, the groove-shaped gap portion 121B has a substantially rectangular cross section and is continuously formed along the stitch pattern 3. The groove width and groove depth of the groove-shaped gap portion 121B are formed so that at least the retaining portion 41 of the thread locking member 4 is inserted. Here, the thread engaging portion 42 of the thread locking member 4 projects into the foam layer 22B of the skin material 2B, but the thread engaging portion 42 may also be inserted into the groove-shaped gap portion 121B.

With the above configuration, even when the foam layer 22B of the skin material 2B is thin or the rigidity of the foam layer 22B is high, the thread locking member 4 is reasonably inserted between the base material 1B and the skin material 2B (21B, 22B). can do. For example, even when the foam layer 22B of the skin material 2B is flattened in the vicinity of a portion where the base material 1B is bent at a right angle or an acute angle, the base material 1B is not deformed without deforming the thread locking member 4. It is possible to reduce the amount d of the thread locking member 4 protruding toward the skin material side by embedding it in the groove-shaped gap portion 121B. As a result, the thread locking member 4 inserted between the base material 1B and the skin material 2B suppresses the deformation (unevenness) of the skin 21B of the skin material 2B, and the stitches on the surface side of the skin material 2B have a good appearance. The pattern 3 can be easily formed.

(Third Example)
As shown in FIGS. 1 and 4, the stitch decorative component 10C of the third embodiment includes a base material 1C and a skin material 2C adhered to the surface 12C of the base material 1C, and is provided on the surface side of the skin material 2C. It is a stitch decorative part 10C having a stitch pattern 3 formed on the surface side of the skin material 2C by the thread 31 inserted from the above. The skin material 2C is composed of a skin 21C having excellent ductility on the surface side and a foam layer 22C on the base material side. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1C and the skin material 2C at the position of the seam 32 of the stitch pattern 3. Here, since the configurations of the stitch pattern 3 and the thread locking member 4 are the same as those in the first embodiment, the same reference numerals are given and detailed description thereof will be omitted.

The stitch decorative part 10C of the third embodiment has the following configuration different from that of the first embodiment. That is, in the stitch decorative component 10C of the third embodiment, the groove-shaped gap portion 121C is formed on the surface 12C of the base material 1C along the stitch pattern 3, and the groove-shaped gap portion 121C is formed of rubber. The system member 6C is fitted, and the thread locking member 4 is inserted into the rubber system member 6C. Further, the groove-shaped gap portion 121C is formed continuously along the stitch pattern 3 with a substantially rectangular cross section, and the rubber-based member 6C fitted in the groove-shaped gap portion 121C also has a substantially rectangular cross section and has a stitch pattern. It is formed continuously along 3.

Further, the width and height of the rubber-based member 6C fitted in the groove-shaped gap portion 121C are formed so that at least the retaining portion 41 of the thread locking member 4 is inserted. Here, the thread engaging portion 42 of the thread locking member 4 projects into the foam layer 22C of the skin material 2C, but the thread engaging portion 42 may also be inserted into the rubber-based member 6C. Further, the rubber-based member 6C may be a member having a stronger holding force and binding force on the thread locking member 4 than the skin material 2C. For example, vulcanized rubber such as natural rubber or synthetic rubber, or a thermoplastic elastomer. This applies to heat-curable elastomers, etc.

With the above configuration, even when the foam layer 22C of the skin material 2C is soft and the holding force of the thread locking member 4 is small, the holding force and the binding force on the thread locking member 4 are increased by the elastic binding force of the rubber-based member 6C. Can be done. Therefore, it is possible to suppress the thread locking member 4 inserted between the base material 1C and the skin material 2C from coming off, and to easily form a good-looking stitch pattern 3 on the surface side of the skin material 2C.

(Fourth Example)
As shown in FIGS. 1 and 5, the stitch decorative component 10D of the fourth embodiment includes a base material 1D and a skin material 2D adhered to the surface 12D of the base material 1D, and is provided on the surface side of the skin material 2D. It is a stitch decorative part 10D having a stitch pattern 3 formed on the surface side of the skin material 2D by the thread 31 inserted from the above. The skin material 2D is composed of a skin 21D having excellent ductility on the surface side and a foam layer 22D on the base material side. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1D and the skin material 2D at the position of the seam 32 of the stitch pattern 3. Here, since the configurations of the stitch pattern 3 and the thread locking member 4 are the same as those in the first embodiment, the same reference numerals are given and detailed description thereof will be omitted.

The stitch decorative part 10D of the fourth embodiment has the following configuration different from that of the first embodiment. That is, in the stitch decorative part 10D of the fourth embodiment, the longitudinal direction of the retaining portion 41 of the thread locking member 4 is arranged in the direction orthogonal to the sewing direction F of the stitch pattern 3. Therefore, the thread 31 is inserted through the thread engagement portion 42 in substantially the same direction as the sewing direction F of the stitch pattern 3.

With the above configuration, even when the stitch spacing of the stitch pattern 3 is narrow, interference between the retaining portions 41 can be avoided. Further, since the thread 31 can be locked to the thread engagement portion 42 at the position of the stitch 32 of the stitch pattern 3 without twisting in the direction orthogonal to the sewing direction F of the stitch pattern 3, the stitch looks even better. A pattern can be formed.

(Fifth Example)
As shown in FIGS. 1 and 6, the stitch decorative component 10E of the fifth embodiment includes a base material 1E and a skin material 2E adhered to the surface 12E of the base material 1E, and is provided on the surface side of the skin material 2E. It is a stitch decorative part 10E having a stitch pattern 3 formed on the surface side of the skin material 2E by the thread 31 inserted from the above. The skin material 2E is composed of a skin 21E having excellent ductility on the surface side and a foam layer 22E on the base material side. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1E and the skin material 2E at the position of the seam 32 of the stitch pattern 3. Here, since the configurations of the stitch pattern 3 and the thread locking member 4 are the same as those in the first embodiment, the same reference numerals are given and detailed description thereof will be omitted.

The stitch decorative part 10E of the fifth embodiment has the following configuration different from that of the first embodiment. That is, in the stitch decorative part 10E of the fifth embodiment, the groove-shaped gap portion 121E is formed on the surface 12E of the base material 1E along the stitch pattern 3, and the thread locking member 4 has the groove-shaped gap portion. It is inserted in 121E. Further, the groove-shaped gap portion 121E is formed intermittently along the stitch pattern 3 in a substantially rectangular cross section. The groove width and groove depth of the groove-shaped gap portion 121E are formed so that at least the retaining portion 41 of the thread locking member 4 is inserted. Here, the thread engaging portion 42 of the thread locking member 4 projects into the foam layer 22E of the skin material 2E, but the thread engaging portion 42 may also be inserted into the groove-shaped gap portion 121E.

With the above configuration, even when the foam layer 22E of the skin material 2E is thin or the rigidity of the foam layer 22E is high, the thread locking member 4 is reasonably inserted between the base material 1E and the skin material 2E (21E, 22E). can do. For example, even when the foam layer 22E of the skin material 2E is compressed in a flat shape in the vicinity of a portion where the base material 1E is bent at a right angle or an acute angle, the base material 1E is not deformed without deforming the thread locking member 4. It is possible to reduce the amount d of the thread locking member 4 protruding toward the skin material side by embedding it in the groove-shaped gap portion 121E. As a result, the thread locking member 4 inserted between the base material 1E and the skin material 2E suppresses the deformation (unevenness) of the skin 21E of the skin material 2E, and the stitches on the surface side of the skin material 2E have a good appearance. The pattern 3 can be easily formed.

Further, in the stitch decorative part 10E of the fifth embodiment, the longitudinal direction of the retaining portion 41 of the thread locking member 4 is arranged in a direction orthogonal to the sewing direction F of the stitch pattern 3. Therefore, the thread 31 is inserted through the thread engagement portion 42 in substantially the same direction as the sewing direction F of the stitch pattern 3.

With the above configuration, even when the stitch spacing of the stitch pattern 3 is narrow, interference between the retaining portions 41 can be avoided. Further, since the thread 31 can be locked to the thread engagement portion 42 at the position of the stitch 32 of the stitch pattern 3 without twisting in the direction orthogonal to the sewing direction F of the stitch pattern 3, the stitch looks even better. The pattern 3 can be formed.

(6th Example)
As shown in FIGS. 1 and 7, the stitch decorative component 10F of the sixth embodiment includes a base material 1F and a skin material 2F adhered to the surface 12F of the base material 1F, and is provided on the surface side of the skin material 2F. It is a stitch decorative part 10F having a stitch pattern 3 formed on the surface side of the skin material 2F by the thread 31 inserted from the above. The skin material 2F is composed of a skin 21F having excellent ductility on the surface side and a foam layer 22F on the base material side. Further, the thread 31 forming the stitch pattern 3 is locked by the thread locking member 4 inserted between the base material 1F and the skin material 2F at the position of the seam 32 of the stitch pattern 3. Here, since the configurations of the stitch pattern 3 and the thread locking member 4 are the same as those in the first embodiment, the same reference numerals are given and detailed description thereof will be omitted.

The stitch decorative part 10F of the sixth embodiment is different from the first embodiment in the following configuration. That is, in the stitch decorative component 10F of the sixth embodiment, the groove-shaped gap portion 121F is formed on the surface 12F of the base material 1F along the stitch pattern 3, and the groove-shaped gap portion 121F is formed of rubber. The system member 6F is fitted, and the thread locking member 4 is inserted into the rubber system member 6F. Further, the groove-shaped gap portion 121F is formed continuously along the stitch pattern 3 with a substantially rectangular cross section, and the rubber-based member 6F fitted in the groove-shaped gap portion 121F also has a substantially rectangular cross section and has a stitch pattern. It is formed continuously along 3.

Further, the width and height of the rubber-based member 6F fitted in the groove-shaped gap portion 121C are formed so that at least the retaining portion 41 of the thread locking member 4 is inserted. Here, the thread engaging portion 42 of the thread locking member 4 projects into the foam layer 22F of the skin material 2F, but the thread engaging portion 42 may also be inserted into the rubber-based member 6F. Further, the rubber-based member 6F may be a member having a stronger holding force and binding force on the thread locking member 4 than the skin material 2F. For example, vulcanized rubber such as natural rubber or synthetic rubber, or a thermoplastic elastomer. This applies to heat-curable elastomers, etc.

With the above configuration, even when the foam layer 22F of the skin material 2F is soft and the holding force of the thread locking member 4 is small, the holding force and the binding force with respect to the thread locking member 4 are increased by the elastic binding force of the rubber-based member 6F. Can be done. Therefore, it is possible to suppress the thread locking member 4 inserted between the base material 1F and the skin material 2F from coming off, and to easily form a good-looking stitch pattern 3 on the surface side of the skin material 2F.

Further, in the stitch decorative part 10F of the sixth embodiment, the longitudinal direction of the retaining portion 41 of the thread locking member 4 is arranged in a direction orthogonal to the sewing direction F of the stitch pattern 3. Therefore, the thread 31 is inserted through the thread engagement portion 42 in substantially the same direction as the sewing direction F of the stitch pattern 3.

With the above configuration, even when the stitch spacing of the stitch pattern 3 is narrow, interference between the retaining portions 41 can be avoided. Further, since the thread 31 can be locked to the thread engagement portion 42 at the position of the stitch 32 of the stitch pattern 3 without twisting in the direction orthogonal to the sewing direction F of the stitch pattern 3, the stitch looks even better. The pattern 3 can be formed.

<Manufacturing method of this stitch decorative part>
Next, a method of manufacturing the present stitch decorative part will be described with reference to FIGS. 10 to 14. Here, a method for manufacturing the stitch decorative part 10 of the first embodiment shown in FIG. 2 and a method for manufacturing the stitch decorative part 10D of the fourth embodiment shown in FIG. 5 will be exemplified. FIG. 10 shows a perspective view of the locking member unit and the insertion needle in which the thread locking members shown in FIGS. 2 to 7 are connected to the connecting rod at a predetermined pitch. 11 is a view taken along the arrow B shown in FIG. 10, showing a state in which the thread locking member at the head of the thread locking member unit is separated and held by the insertion needle. FIG. 12 shows the arrow C view shown in FIG. FIG. 13 shows a machining cross-sectional view showing a machining procedure for forming the stitch pattern shown in FIG. 2, (a) shows a state before inserting the insertion needle at the position of the seam, and (b) advances the extrusion pin. The thread locking member is pushed out into the skin material from the tip of the insertion needle, and (c) is the position of the seam, where the thread locking member that locks the thread is between the base material and the skin material. Indicates the inserted state. 14 shows a machining cross-sectional view showing a machining procedure for forming the stitch pattern shown in FIG. 5, FIG. 14A shows a state before inserting the insertion needle at the position of the seam, and FIG. 14B shows the state before the insertion needle is inserted at the seam position, and FIG. The thread locking member is pushed out into the skin material from the tip of the insertion needle, and (c) is the position of the seam, where the thread locking member that locks the thread is between the base material and the skin material. Indicates the inserted state.

As shown in FIG. 10, first, a locking member unit 40 in which a plurality of thread locking members 4 are connected to a guide rod 45 formed in a straight line at a predetermined pitch is manufactured in advance. In the locking member unit 40, each retaining portion 41 is arranged in parallel in a direction orthogonal to the guide rod 45, and the intermediate portion 411 of the retaining portion 41 is attached to the guide rod 45 via the connecting piece 44, respectively. They are connected at equal intervals. The connecting piece 44 is connected to the intermediate portion 411 of the retaining portion 41. The connecting portion 44a with respect to the retaining portion 41 of the connecting piece 44 is thinned so that it can be easily separated. Further, the through holes 421a of each torus 42a as the thread engaging portion 42 are arranged in a straight line along the longitudinal direction (axial direction) of the guide rod 45. A thread 31 is inserted through the through hole 421a of each torus 42a.

Further, as shown in FIGS. 10 to 14, the insertion needle 51 that holds the thread locking member 4 and is inserted between the base material 1 and the skin material 2 and the thread locking member 4 are pushed out from the insertion needle 51. It includes a needle driving device 5 having an extrusion pin 52, an insertion needle 51, and a drive mechanism 53 for advancing and retreating the extrusion pin 52 in the needle axial direction P. The locking member unit 40 is mounted on the needle driving device 5 so as to be movable in the axial direction Q of the guide rod 45. The drive mechanism 53 of the insertion needle 51 and the extrusion pin 52 is not particularly limited, but may be a rack & pinion mechanism or a fluid cylinder mechanism.

Further, as shown in FIG. 10, the insertion needle 51 and the extrusion pin 52 are arranged so as to be able to advance and retreat on the same axis as the retaining portion 41 of the leading thread locking member 4 separated from the guide rod 45. .. The insertion needle 51 is a substantially cylindrical hollow needle whose tip portion 511 is cut in an inclined shape. The extrusion pin 52 is mounted in the hollow portion of the insertion needle 51. The insertion needle 51 is formed with a slit groove 512 along the needle axis direction P from the proximal end side of the tip portion 511. The inner diameter of the insertion needle 51 is formed to be substantially the same as the outer diameter of the retaining portion 41 formed on the cylindrical body. Further, the groove width of the slit groove 512 is formed so that the neck portion 43 of the thread locking member 4 can be inserted through the groove width.

Further, as shown in FIGS. 10 to 12, when the insertion needle 51 is moved in the needle axis direction P, the connection portion 44a of the connecting piece 44 is disconnected, and a cylindrical body is formed in the hollow portion of the insertion needle 51. The retaining portion 41 is inserted from the tip portion 511. At this time, the neck portion 43 is inserted into the slit groove 512. In this state, the retaining portion 41 and the extrusion pin 52 come into contact with each other, and the thread locking member 4 is held by the insertion needle 51. Further, in a state where the thread locking member 4 is held by the insertion needle 51, the thread engagement portion 42 formed in the annular body protrudes toward the outer peripheral side of the insertion needle 51.

Further, as shown in FIGS. 13 and 14, in the needle driving device 5, the tip portion 511 of the insertion needle 51 in a state where the thread locking member 4 in which the thread 31 is locked is held by the stitch 32 of the stitch pattern 3. After or at the same time as inserting between the base material 1 and the skin material 2 from the surface side of the skin material 2 at the position, the extrusion pin 52 is advanced to advance the thread locking member 4 from the tip portion 511 of the insertion needle 51. The thread locking member 4 in a state where the thread 31 is locked by extruding into the material is inserted between the base material 1 and the skin material 2. The foam layer 22 of the skin material 2 is compressed by the inserted thread locking member 4.

Specifically, when the thread locking member 4 is inserted between the base material 1 and the skin material 2 so that the longitudinal direction of the retaining portion 41 is substantially the same as the sewing direction F of the stitch pattern 3. (See the stitch decorative part 10 of the first embodiment shown in FIG. 2), as shown in FIG. 13 (a), the tip portion 511 of the insertion needle 51 is close to the position of the seam, and the insertion needle 51 The insertion needle 51 is tilted so that the base end side faces diagonally upward with respect to the sewing direction F. The inclination angle θ of the insertion needle 51 with respect to the skin material 2 (21, 22) is preferably in the range of 30 degrees to 70 degrees. Here, if the inclination angle θ is smaller than 30 degrees, the holes in the seams 32 become elliptical, and the appearance quality of the stitch pattern 3 may deteriorate. On the other hand, if the inclination angle θ is larger than 70 degrees, the retaining portion 41 may be bent, and the inclination angle θ is preferably in the range of 30 degrees to 70 degrees.

Next, as shown in FIG. 13B, the extrusion pin 52 is advanced with the tip portion 511 of the insertion needle 51 inserted into the skin material. The retaining portion 41 is pushed by the extrusion pin 52 and detaches from the tip portion 511 of the insertion needle 51. Since the inclination angle θ of the insertion needle 51 is in the range of 30 degrees to 70 degrees, the retaining portion 41 advances while sliding on the surface of the base material 1, and as shown in FIG. 13C, the thread engagement portion The thread locking member 4 is inserted between the base material 1 and the skin material 2 with the 42 facing upward.

Further, the thread locking member 4 is placed between the base material 1D and the skin material 2D (21D, 22D) so that the longitudinal direction of the retaining portion 41 is the direction H substantially orthogonal to the sewing direction F of the stitch pattern 3. (See the stitch decorative part 10D of the fourth embodiment shown in FIG. 5), as shown in FIG. 14A, the tip portion 511 of the insertion needle 51 is close to the position of the seam. The insertion needle 51 is tilted so that the base end side of the insertion needle 51 faces diagonally upward with respect to the direction H substantially orthogonal to the sewing direction F. The inclination angle θ of the insertion needle 51 with respect to the skin material 2 is preferably in the range of 30 degrees to 70 degrees.

Next, as shown in FIG. 14B, the extrusion pin 52 is advanced with the tip portion 511 of the insertion needle 51 inserted into the skin material. The retaining portion 41 is pushed by the extrusion pin 52 and detaches from the tip portion 511 of the insertion needle 51. Since the inclination angle θ of the insertion needle 51 is in the range of 30 degrees to 70 degrees, the retaining portion 41 advances while sliding on the surface of the base material 1, and as shown in FIG. 14C, the thread engagement portion The thread locking member 4 is inserted between the base material 1D and the skin material 2D with the 42 facing upward. In this case, even when the stitch spacing of the stitch pattern 3 is narrow, interference between the retaining portions 41 can be avoided. Further, since the thread 31 can be locked to the thread engagement portion 42 at the position of the stitch 32 of the stitch pattern 3 without twisting in the direction orthogonal to the sewing direction F of the stitch pattern 3, the stitch looks even better. The pattern 3 can be formed.

Although FIG. 13 shows a processing procedure for forming the stitch decorative part 10 of the first embodiment shown in FIG. 2, the longitudinal direction of the retaining portion 41 is substantially the same as the sewing direction F of the stitch pattern 3. The stitch decorative part 10B of the second embodiment shown in FIG. 3 and the third stitch decorative part 10B shown in FIG. 4, in which the thread locking member 4 is inserted between the base material 1 and the skin material 2 so as to be Needless to say, it can also be applied to the stitch decorative part 10C of the embodiment. Further, in FIG. 14, the processing procedure for forming the stitch decorative part 10D of the fourth embodiment shown in FIG. 5 is shown, but the longitudinal direction of the retaining portion 41 is substantially orthogonal to the sewing direction F of the stitch pattern 3. FIG. 6 shows the stitch decorative parts 10E of the fifth embodiment shown in FIG. 6, and FIG. 7 shows a case where the thread locking member 4 is inserted between the base material 1 and the skin material 2 so as to be in the direction H. Needless to say, it can also be applied to the stitch decorative part 10F of the sixth embodiment.

Further, as shown in FIGS. 10 to 12, the needle driving device 5 separates the next thread locking member 4 connected to the guide rod 45 while moving the guide rod 45 in the axial direction Q by a predetermined pitch. The separated thread locking member 4 is held by the insertion needle 51 and inserted into the skin material, and the thread 31 of the stitch pattern 3 is continuously inserted between the base material 1 and the skin material 2. Can be sewn. Further, the needle drive device 5 can be attached to a robot device (not shown) to automatically sew the stitch pattern 3 of the stitch decorative parts 10 (10B, 10C, 10E, 10F).

<Action effect>
As described in detail above, according to the stitch decorative parts 10, 10B, 10C, 10D, 10E, and 10F according to the present embodiment, the thread 31 is the base material 1 at the position of the stitch 32 of the stitch pattern 3. Since the threads are locked by the thread locking members 4 and 4B inserted between the 1B, 1C, 1D, 1E and 1F and the skin material 2, the back surfaces of the base materials 1, 1B, 1C, 1D, 1E and 1F are used. The stitch pattern 3 can be formed on the surface side of the skin materials 2, 2B, 2C, 2D, 2E, and 2F without being influenced by the structural factors on the side. That is, the thread locking members 4 and 4B that lock the thread 31 at the position of the seam 32 of the stitch pattern 3 are the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C, 2D. Since it is inserted between the 2E and 2F, it is not necessary to insert the thread 31 to the back surface side of the base materials 1, 1B, 1C, 1D, 1E and 1F, and the base materials 1, 1B, 1C, 1D and 1E It is not affected by structural factors on the back side of the 1st floor. For example, when the reinforcing ribs 11, 11B, 11C, 11D, 11E, 11F are formed on the back surface side of the base materials 1, 1B, 1C, 1D, 1E, 1F, the reinforcing ribs 11, 11B, 11C, 11D, The stitch pattern 3 can be easily formed above the 11E and 11F or at a position adjacent to the reinforcing ribs 11, 11B, 11C, 11D, 11E and 11F. Further, when the base materials 1, 1B, 1C, 1D, 1E and 1F are formed by bending at a right angle or an acute angle, the corner portions where the base materials 1, 1B, 1C, 1D, 1E and 1F are bent. Also, the stitch pattern 3 can be easily formed.

Therefore, according to the present embodiment, stitch decoration that makes it easy to form a good-looking stitch pattern 3 without being affected by structural factors on the back surface side of the base materials 1, 1B, 1C, 1D, 1E, and 1F. Parts 10, 10B, 10C, 10D, 10E, and 10F can be provided.

Further, according to the present embodiment, groove-shaped gap portions 121B and 121E are formed on the surfaces 12B and 12E of the base materials 1B and 1E along the stitch pattern 3, and the thread locking members 4 and 4B are groove-shaped. Since it is inserted into the gaps 121B and 121E, the base materials 1B and 1E and the skin material 2B, even when the foam layers 22B and 22E of the skin materials 2B and 2E are thin or the foam layers 22B and 22E have high rigidity, The thread locking members 4 and 4B can be easily inserted between the 2E and the thread locking member 4, 4B. Therefore, for example, even when the foam layers 22B and 22E of the skin materials 2B and 2E are compressed in a flat shape in the vicinity of a portion where the base materials 1B and 1E are bent at a right angle or an acute angle, the thread locking member 4 Can be embedded in the groove-shaped gaps 121B and 121E of the base materials 1B and 1E without deforming, and the amount d of the thread locking members 4 and 4B protruding toward the skin material can be reduced. As a result, the thread locking member 4 inserted between the base materials 1B and 1E and the skin materials 2B and 2E suppresses the deformation (unevenness) of the skins 21B and 21E of the skin materials 2B and 2E, and the skin materials 2B A good-looking stitch pattern 3 can be easily formed on the surface side of 2E.

Further, according to the present embodiment, the rubber-based members 6C and 6F are fitted in the groove-shaped gap portions 121C and 121F, and the thread locking member 4 is inserted in the rubber-based members 6C and 6F. Even when the foam layers 22C and 22F of the skin materials 2C and 2F are soft and the holding force of the thread locking members 4 and 4B is small, the elastic binding force of the rubber members 6C and 6F holds the thread locking members 4 and 4B. You can increase your power. Therefore, the thread locking members 4 and 4B inserted between the base materials 1C and 1F and the skin materials 2C and 2F are suppressed from coming off, and a good-looking stitch pattern 3 can be easily formed on the surface side of the skin materials 2C and 2F. Can be formed.

Further, according to the present embodiment, the thread locking members 4, 4B have a retaining portion 41 extending along the base materials 1, 1B, 1C, 1D, 1E, and 1F, and a retaining portion 41 on the anti-base material side. Since the thread 31 is formed in the above and has a thread engaging portion 42 for locking the thread 31, a tensile force is applied to the surface side of the skin materials 2, 2B, 2C, 2D, 2E, and 2F on the thread 31 locked to the thread engaging portion 42. Even if it acts, the skin materials 2, 2B, 2C, 2D, 2E, and 2F that cover the retaining portion 41 resist and the retaining portion 41 extends along the base materials 1, 1B, 1C, 1D, 1E, and 1F. Can be prevented from coming out of the skin materials 2, 2B, 2C, 2D, 2E, and 2F. Therefore, the thread locking members 4 and 4B that lock the thread 31 do not come out from the skin materials 2, 2B, 2C, 2D, 2E, and 2F, and the thread 31 forming the stitch pattern 3 is prevented from coming off or fraying. Then, a good-looking stitch pattern 3 can be formed.

Further, according to the present embodiment, the retaining portion 41 is made of a cylindrical body having a predetermined length, and the thread engaging portion 42 is made of an annular body or a C-shaped body through which a thread is passed, and the axis CL1 and the circle of the cylindrical body. Since the axial center CL2 of the ring or C-shape is orthogonal to each other and the axial thicknesses t1 and t2 of the ring or C-shape are smaller than the outer diameter t3 of the cylinder, the volumes of the thread locking members 4 and 4B can be increased. It can be miniaturized and easily inserted between the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C, 2D, 2E, and 2F. Therefore, the skin materials 2, 2B by the thread locking members 4, 4B inserted between the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C, 2D, 2E, and 2F. The amount of compression of 2C, 2D, 2E, and 2F can be minimized to form a good-looking stitch pattern 3.

Further, according to the method for manufacturing the stitch decorative parts 10, 10B, 10C, 10D, 10E, and 10F according to another embodiment, the thread locking members 4, 4B are held and the base materials 1, 1B, 1C, and 1D are held. An insertion needle 51 to be inserted between 1E, 1F and the skin materials 2, 2B, 2C, 2D, 2E, and 2F, an extrusion pin 52 for pushing out thread locking members 4, 4B from the insertion needle 51, and an insertion needle 51. The needle drive device 5 includes a needle drive device 5 having a drive mechanism 53 for advancing and retreating the extrusion pin 52, and the needle drive device 5 is a tip portion of an insertion needle 51 in a state of holding the thread locking members 4 and 4B in which the thread 31 is locked. 511 from the surface side of the skin materials 2, 2B, 2C, 2D, 2E, and 2F at the position of the seam 32 of the stitch pattern 3, the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C. After or at the same time as inserting between, 2D, 2E and 2F, the extrusion pin 52 is advanced to move the thread locking members 4, 4B from the tip portion 511 of the insertion needle 51 to the skin materials 2, 2B, 2C, 2D. , 2E, 2F, and the thread locking members 4, 4B in a state where the thread 31 is locked are extruded into the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C, 2D, 2E. Since the thread is inserted between the threads and the 2nd floor, the thread locking member 4 in a state where the thread 31 is locked by simply inserting the insertion needle 51 into the position of the seam 32 of the stitch pattern 3 and advancing the extrusion pin 52. 4B can be easily inserted and fixed between the skin materials 2, 2B, 2C, 2D, 2E, 2F and the base materials 1, 1B, 1C, 1D, 1E, 1F, and the skin materials 2, 2B, 2C. The stitch pattern 3 can be easily formed on the surface side of 2D, 2E, and 2F.

Therefore, according to the present and other embodiments, stitches that can easily form a good-looking stitch pattern 3 without being affected by structural factors on the back surface side of the base materials 1, 1B, 1C, 1D, 1E, and 1F. It is possible to provide a method for manufacturing decorative parts 10, 10B, 10C, 10D, 10E, and 10F.

Further, according to the present and other embodiments, a locking member unit 40 in which a plurality of thread locking members 4 are connected to a linearly formed guide rod 45 at a predetermined pitch is manufactured in advance and locked. Since the member unit 40 is attached to the needle drive device 5, it is possible to save the trouble of attaching the plurality of thread locking members 4 and 4B to the needle drive device 5 one by one. Further, the needle driving device 5 separates the thread locking members 4 and 4B connected to the guide rod 45 while moving the guide rod 45 in the axial direction by a predetermined pitch, and the separated thread locking members 4 and 4B. Is held by the insertion needle 51 and extruded into the skin materials 2, 2B, 2C, 2D, 2E, 2F, and the skin materials 2, 2B, 2C, 2D, 2E, 2F and the base materials 1, 1B, 1C, 1D, 1E Since it is inserted between the first and the first floor, the thread locking members 4 and 4B separated from the guide rod 45 can be separated from the guide rod 45 by simply moving the needle driving device 5 along the seam 32 of the stitch pattern 3 as the skin materials 2, 2B and 2C. , 2D, 2E, 2F and the base materials 1, 1B, 1C, 1D, 1E, 1F can be continuously inserted. Therefore, the stitch pattern 3 having a good appearance can be formed more quickly.

Further, according to the present and other embodiments, the inclination angle θ of the insertion needle 51 with respect to the skin materials 2, 2B, 2C, 2D, 2E, and 2F is in the range of 30 degrees to 70 degrees, so that the insertion needle 51 can be used. With the held thread locking members 4, 4B inserted into the skin materials 2, 2B, 2C, 2D, 2E, and 2F, the extrusion pin 52 advances to insert the thread locking members 4, 4B into the needle 51. When extruding from, the thread locking members 4, 4B can be smoothly moved along the base material and the like. Therefore, the resistance force that the thread locking members 4 and 4B receive from the base material and the like is relaxed, and the base materials 1, 1B, 1C, 1D, 1E, 1F and the skin materials 2, 2B, 2C, 2D, 2E, and 2F are used. The thread locking members 4 and 4B can be stably inserted between the two. As a result, the stitch pattern 3 having a good appearance can be stably formed.

<Modification example>
The above-described embodiment can be changed without changing the gist of the present invention. For example, according to the present embodiment, the retaining portion 41 is made of a cylindrical body having a predetermined length, and the thread engaging portion 42 is made of a torus 42a or a C-shaped body 42b through which a thread is passed, and the axial center CL1 of the cylindrical body is formed. And the axial center CL2 of the torus 42a or the C-shaped 42b are orthogonal to each other, and the thicknesses t1 and t2 in the axial direction of the torus 42a or the C-shaped 42b are formed so as to be smaller than the outer diameter t3 of the cylinder. However, it does not necessarily have to be limited to this.

For example, the retaining portion 41 is made of a prism having a predetermined length, the thread engaging portion 42 is made of a prism through which the thread 31 is passed, and the axis of the prism and the axis of the prism are orthogonal to each other. The thickness of the prism in the axial direction may be smaller than that of one side of the prism.

INDUSTRIAL APPLICABILITY The present invention can be used as a stitch decorative part in which a stitch pattern is sewn only by a thread inserted from the surface side of the skin material adhered to the surface of the base material, and a method for manufacturing the same.

1,1B, 1C, 1D, 1E, 1F Base material 2, 2B, 2C, 2D, 2E, 2F Skin material 3 Stitch pattern 4, 4B Thread locking member 5 Needle drive device 6C, 6F Rubber member 10, 10B, 10C, 10D, 10E, 10F Stitch decoration parts 12, 12B, 12C, 12D, 12E, 12F Surface 31 Thread 32 Seam 40 Locking member unit 41 Retaining part 42 Thread engagement part 42a Circular body 42b C-shaped body 45 Guide rod 51 Insertion needle 52 Extrude pin 53 Drive mechanism 121B, 121C, 121E, 121F Groove-shaped gap 511 Tip part θ Inclination angle

Claims (7)

A stitch decorative part having a base material and a skin material adhered to the surface of the base material, and having a stitch pattern formed on the surface side of the skin material by a thread inserted from the surface side of the skin material. ,
The thread is locked by a thread locking member inserted between the base material and the skin material at the position of the stitch of the stitch pattern .
The thread locking member has a retaining portion extending along the base material and a thread engaging portion formed on the anti-base material side of the retaining portion to lock the yarn.
The retaining portion is a rod-shaped body having a length in the longitudinal direction larger than the external dimension of the thread engaging portion in the same direction, and the thread locked to the thread engaging portion is on the surface side of the skin material. A stitch decorative component, characterized in that, even when a tensile force acts on the skin, the skin material covering the retaining portion resists and the retaining portion is prevented from coming out of the skin material. In the stitch decorative part according to claim 1,
A stitch decorative component characterized in that a groove-shaped gap is formed on the surface of the base material along the stitch pattern, and the thread locking member is inserted into the groove-shaped gap. In the stitch decorative part according to claim 2,
A stitch decorative part, characterized in that a rubber-based member is fitted in the groove-shaped gap portion, and the thread locking member is inserted into the rubber-based member. In the stitch decorative part according to any one of claims 1 to 3.
The retaining portion is made of a cylinder having a predetermined length, and the thread engagement portion is made of a torus or C-shaped body through which the thread is passed, and the axis of the cylinder and the axis of the torus or C-shaped body. A stitch decorative part characterized in that the center is orthogonal to the center and the axial thickness of the torus or C-shape is smaller than the outer diameter of the cylinder. In the method for manufacturing a stitch decorative part according to any one of claims 1 to 4.
An insertion needle that holds the thread locking member and inserts it between the base material and the skin material, an extrusion pin that pushes out the thread locking member from the insertion needle, and advances and retreats of the insertion needle and the extrusion pin. Equipped with a needle drive device with a drive mechanism,
In the needle driving device, the tip of the insertion needle in a state of holding the thread locking member in which the thread is locked is placed on the base material and the base material from the surface side of the skin material at the position of the stitch of the stitch pattern. After or at the same time as inserting the thread between the skin material and the skin material, the extrusion pin is advanced to push the thread locking member into the skin material from the tip of the insertion needle to lock the thread. A method for manufacturing a stitch decorative part, which comprises inserting the thread locking member between the base material and the skin material. In the method for manufacturing a stitch decorative part according to claim 5.
A locking member unit in which a plurality of the thread locking members are connected to a guide rod formed in a straight line at a predetermined pitch is manufactured in advance, and the locking member unit is mounted on the needle driving device.
The needle drive device disconnects the thread locking member connected to the guide rod while moving the guide rod in the axial direction by a predetermined pitch, and holds the separated thread locking member in the insertion needle. A method for manufacturing a stitch decorative part, which comprises extruding the material into the skin material and inserting the material between the skin material and the base material. In the method for manufacturing a stitch decorative part according to claim 5 or 6.
A method for manufacturing a stitch decorative part, wherein the inclination angle of the insertion needle with respect to the skin material is in the range of 30 degrees to 70 degrees.

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